Koolaire Undercounter Models Owner Instruction Manual

Brand: Koolaire

Model: Undercounter Models

Category: Ice cube makers

Type: Owner Instruction Manual

lnstallation, Operation and Maintenance Manual

Koolaire Ice Machines

UnderCounter Models

Part Number 040004686 8/15

Table of Contents

2 Part Number 040004686 8/15

Section 1 

General Information

Model Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Bin Caster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Arctic Pure Water Filter System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Manitowoc Cleaner and Sanitizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Section 2 

Installation Instructions

Location of Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Ice Machine Heat of Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Leveling the Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Electrical Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Fuse/Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Total Circuit Ampacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Ground Fault Circuit Interrupter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

K130/K170/K210/K270 Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Water Service/Drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Water Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Water Inlet Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Drain Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Cooling Tower Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Water Supply and Drain Line Sizing/Connections . . . . . . . . . . . . . . . . . . . . . . . . 8

Before Starting the Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Section 3 

Operation

Ice Making Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Initial Start-up Or Start-up After Automatic Shut-off . . . . . . . . . . . . . . . . . . . . . . 10

Freeze Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Harvest Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Automatic Shut-off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Energized Parts Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Operational Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Siphon System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Water Float Valve Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Water Level Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Ice Bridge Thickness Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table of Contents (continued)

Part Number 040004686 8/15 3

Section 4 

Maintenance

Interior Cleaning and Sanitizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Cleaning and Sanitizing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Ice Machine Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Exterior Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Cleaning the Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Removal from Service/Winterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Section 5 

Customer Support

Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Safety Limit Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Commercial Ice Machine Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Residential Ice Machine Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4 Part Number 040004686 8/15

Section 1

General Information

Safety Notices

As you work on Manitowoc equipment, be sure to pay close

attention to the safety notices in this handbook. Disregarding

the notices may lead to serious injury and/or damage to the

equipment.

Throughout this handbook, you will see the following types of

safety notices:

Procedural Notices

As you work on Manitowoc equipment, be sure to read the

procedural notices in this handbook. These notices supply

helpful information which may assist you as you work.

Throughout this handbook, you will see the following types of

procedural notices:

NOTE: Text set off as a Note provides you with simple, but

useful, extra information about the procedure you are

performing.

Read These Before Proceeding:

Warning

Text in a Warning box alerts you to a potential

personal injury situation. Be sure to read the

Warning statement before proceeding, and work

carefully.

Caution

Text in a Caution box alerts you to a situation in

which you could damage the equipment. Be sure

to read the Caution statement before proceeding,

and work carefully.

Important

Text in an Important box provides you with

information that may help you perform a

procedure more efficiently. Disregarding this

information will not cause damage or injury, but it

may slow you down as you work.

Caution

Proper installation, care and maintenance are essential

for maximum performance and trouble-free operation of

your equipment. Visit our website www.manitowocfsg.com

for manual updates, translations, or contact information

for service agents in your area.

Important

Routine adjustments and maintenance procedures

outlined in this handbook are not covered by the warranty.

Warning

Read this manual thoroughly before operating, installing

or performing maintenance on the equipment. Failure to

follow instructions in this manual can cause property

damage, injury or death.

Warning

Do not use electrical appliances or accessories other than

those supplied by Manitowoc for your ice machine model.

Warning

Two or more people or a lifting device are required to lift

this appliance.

Warning

This equipment contains high voltage electricity and

refrigerant charge. Installation and repairs are to be

performed by properly trained technicians aware of the

dangers of dealing with high voltage electricity and

refrigerant under pressure.The technician must also be

certified in proper refrigerant handling and servicing

procedures. All lockout and tag out procedures must be

followed when working on this equipment.

Warning

Do not damage the refrigeration circuit when installing,

maintaining or servicing the unit.

Section 1 General Information

Part Number 040004686 8/15 5

Warning

Do not operate equipment that has been misused, abused,

neglected, damaged, or altered/modified from that of original

manufactured specifications. This appliance is not intended

for use by persons (including children) with reduced physical,

sensory or mental capabilities, or lack of experience and

knowledge, unless they have been given supervision

concerning use of the appliance by a person responsible for

their safety. Do not allow children to play with this appliance.

Warning

All covers and access panels must be in place and

properly secured, before operating this equipment.

Warning

Do not obstruct machine vents or openings.

Warning

Do not store gasoline or other flammable vapors or liquids

in the vicinity of this or any other appliance.

Warning

Do not clean with water jet.

Warning

It is the responsibility of the equipment owner to perform

a Personal Protective Equipment Hazard Assessment to

ensure adequate protection during maintenance

procedures.

Warning

Some 50 hz models may contain up to 150 grams of R290

(propane) refrigerant. R290 (propane) is flammable in

concentrations of air between approximately 2.1% and 9.5%

by volume (LEL lower explosion limit and UEL upper

explosion limit). An ignition source at a temperature higher

than 470°C is needed for a combustion to occur. Refer to

nameplate to identify the type of refrigerant in your

equipment. Only trained and qualified personnel aware of the

dangers are allowed to work on the equipment.

Warning

When using electric appliances, basic precautions must

always be followed, including the following:

a. Read all the instructions before using the

appliance.

b. To reduce the risk of injury, close supervision is

necessary when an appliance is used near

children.

c. Do not contact moving parts.

d. Only use attachments recommended or sold by

the manufacturer.

e. Do not use outdoors.

f. For a cord-connected appliance, the following

must be included:

• Do not unplug by pulling on cord. To unplug,

grasp the plug, not the cord.

• Unplug from outlet when not in use and

before servicing or cleaning.

• Do not operate any appliance with a

damaged cord or plug, or after the appliance

malfunctions or is dropped or damaged in

any manner. Contact the nearest authorized

service facility for examination, repair, or

electrical or mechanical adjustment.

g. Follow applicable lock out tag out procedures

before working on equipment.

h. Connect to a properly grounded outlet only.

Warning

Objects placed or dropped in the bin can affect human

health and safety. Locate and remove any objects

immediately.

Important

The Commonwealth of Massachusetts requires that

all water-cooled models must be connected only to a

closed loop, cooling tower system.

General Information Section 1

6 Part Number 040004686 8/15

Model Numbers

This manual covers the following models:

Accessories

Contact your local distributor for these optional

accessories:

BIN CASTER

Replaces standard legs.

ARCTIC PURE WATER FILTER SYSTEM

Engineered specifically for ice machines, Arctic Pure

water filters are an efficient, dependable, and affordable

method of inhibiting scale formation, filtering sediment,

and removing chlorine taste and odor.

CLEANER AND SANITIZER

Manitowoc Ice Machine Cleaner and Sanitizer are

available in convenient 16 oz. (473 ml) and 1 gal (3.78 l)

bottles. These are the only cleaner and sanitizer

approved for use with these ice machines

These ice machines do not have a water curtain

covering the evaporator. The ice damper performs the

functions of the water curtain see Section 3 for details.

Self-Contained

Air-Cooled

Self-Contained

Water-Cooled

KD0172A --

KY0174A --

KR0270A KR0271W

KD0272A KD0273W

KY0274A KY0275W

Warning

PERSONAL INJURY POTENTIAL

This appliance is not intended for use by persons

(including children) with reduced physical, sensory

or mental capabilities, or lack of experience and

knowledge, unless they have been given

supervision concerning use of the appliance by a

person responsible for their safety. Do allow

children to perform cleaning or maintenance without

adult supervision.

Cleaner Part Number Sanitizer Part Number

16oz 94-0456-3 16oz 94-0565-3

1 Gallon 94-0580-3 1 Gallon 94-0581-3

Warning

Do not damage the refrigeration circuit when

installing, maintaining or servicing the unit.

Warning

Do not use electrical appliances or accessories

other than those supplied by Manitowoc for your

ice machine model.

Part Number 040004686 8/15 7

Section 2

Installation Instructions

Location of Ice Machine

The location selected for the ice machine must meet the

following criteria. If any of these criteria are not met,

select another location.

• The location must be indoors.

• The location must be free of airborne and other

contaminants.

• The air temperature must be at least 40F (4C), but

must not exceed 110F (43C).

• The location must not be near heat-generating

equipment or in direct sunlight.

• The location must be capable of supporting the

weight of the ice machine and a full bin of ice.

• The location must allow enough clearance for water,

drain and electrical connections in the rear of the ice

machine.

• The location must not obstruct airflow through or

around the ice machine (condenser airflow is in and

out the front). Refer to the chart below for clearance

requirements.

NOTE: The ice machine may be built into a cabinet.

There is no minimum clearance requirement for the top

or left and right sides of the ice machine. The listed

values are recommended for efficient operation and

servicing only.

Ice Machine Heat of Rejection

* B.T.U./Hour

** Because the heat of rejection varies during the ice making cycle, the

figure shown is an average.

Ice machines, like other refrigeration equipment, reject

heat through the condenser. It is helpful to know the

amount of heat rejected by the ice machine when sizing

air conditioning equipment where self-contained air-

cooled ice machines are installed.

Leveling the Ice Machine

1. Screw the leveling legs onto the bottom of the ice

machine.

2. Screw the foot of each leg in as far as possible.

3. Move the ice machine into its final position.

4. Level the ice machine to assure that the siphon

system functions correctly. Use a level on top of the

ice machine. Turn each foot as necessary to level

the ice machine from front to back and side to side.

NOTE: An optional 2 ½" caster assembly is available for

use in place of the legs on the K130, K170, K210 and

K270. Installation instructions are supplied with the

casters.

Self-Contained

Air-Cooled

Self-Contained

Water-Cooled

Top/Sides 5" (127 mm)* 5" (127 mm)*

Back 5" (127 mm)* 5" (127 mm)*

Caution

The ice machine must be protected if it will be

subjected to temperatures below 32F (0C).

Failure caused by exposure to freezing

temperatures is not covered by the warranty. See

“Removal from Service/Winterization” Section 4.

Series

Ice Machine

Heat of Rejection*

Air Conditioning** Peak

K170 2200 2600

K270 3800 6000

Caution

The legs must be screwed in tightly to prevent

them from bending.

Warning

Do not obstruct ice machine vents or openings.

Installation Instructions Section 2

8 Part Number 040004686 8/15

Electrical Service

GENERAL

VOLTAGE

The maximum allowable voltage variation is  10% of

the rated voltage on the ice machine model/serial

number plate at start-up (when the electrical load is

highest).

The 115/1/60 ice machines are factory pre-wired with a

8’ power cord, and NEMA 5-15P-plug configuration.

The 208-230/1/60 and 230/50/1 ice machines are

factory pre-wired with a 8’ power cord only, no plug is

supplied.

FUSE/CIRCUIT BREAKER

A separate fuse/circuit breaker must be provided for

each ice machine. Circuit breakers must be H.A.C.R.

rated (does not apply in Canada).

TOTAL CIRCUIT AMPACITY

The total circuit ampacity is used to help select the wire

size of the electrical supply.

The wire size (or gauge) is also dependent upon

location, materials used, length of run, etc., so it must be

determined by a qualified electrician.

GROUND FAULT CIRCUIT INTERRUPTER

Ground Fault Circuit Interrupter (GFCI/GFI) protection is

a system that shuts down the electric circuit (opens it)

when it senses an unexpected loss of power,

presumably to ground. Koolaire does not recommend

the use of a GFCI/GFI circuit protection with our

equipment. If code requires the use of a GFCI/GFI then

you must follow the local code. The circuit must be

dedicated, sized properly and there must be a panel

GFCI/GFI breaker. We do not recommend GFCI/GFI

outlets as they are known for more intermittent nuisance

trips than panel breakers.

K130/K170/K210/K270 ICE MACHINE

Warning

All wiring must conform to local, state and national

codes.

Warning

The ice machine must be grounded in accordance

with national and local electrical codes.

Warning

PERSONAL INJURY POTENTIAL

If the supply cord is damaged, do not operate the

equipment until the cord is replaced by a service

agent or similarly qualified person.

Ice Machine Voltage

Phase

Cycle

Air-Cooled Water Cooled

Maximum Fuse/

Circuit Breaker

Total Amps Maximum Fuse/

Circuit Breaker

Total Amps

K170 115/1/60 15 7.2 -- --

208-230/1/60 15 4.0* -- --

230/1/50 15 4.0* -- --

K270 115/1/60 15 10.7 15 9.9

208-230/1/60 15 5.2 15 4.7

230/1/50 15 5.2 15 4.7

* Indicates preliminary data

Section 2 Installation Instructions

Part Number 040004686 8/15 9

Water Service/Drains

WATER SUPPLY

Local water conditions may require treatment of the

water to inhibit scale formation, filter sediment, remove

chlorine, and improve taste and clarity.

WATER INLET LINES

Follow these guidelines to install water inlet lines:

• Do not connect the ice machine to a hot water

supply. Be sure all hot water restrictors installed for

other equipment are working. (Check valves on sink

faucets, dishwashers, etc.)

• If water pressure exceeds the maximum 

(80 psig-551.5 kPA) recommended pressure, obtain

a water pressure regulator from your local distributor.

• Install a water shut-off valve and union for both the

ice making and condenser water lines.

• Insulate water inlet lines to prevent condensation.

DRAIN CONNECTIONS

Follow these guidelines when installing drain lines to

prevent drain water from flowing back into the ice

machine and storage bin:

• Drain lines must have a 1.5 inch drop per 5 feet of

run (2.5 cm per meter), and must not create traps.

• The floor drain must be large enough to

accommodate drainage from all drains.

• Run separate bin and water-cooled condenser drain

lines. Insulate them to prevent condensation.

• Vent the bin drain to the atmosphere. Do not vent the

condenser drain on water-cooled models.

COOLING TOWER APPLICATIONS

(Water-Cooled Models)

A water cooling tower installation does not require

modification of the ice machine. The water regulator

valve for the condenser continues to control the

refrigeration discharge pressure.

It is necessary to know the amount of heat rejection and

the pressure drop through the condenser and water

valves (inlet and outlet) when using a cooling tower on

an ice machine.

• Water entering the condenser must not exceed 90F

(32C).

• Water flow through the condenser must not exceed 5

gallons (19 liters) per minute.

• Allow for a pressure drop of 7 psi (48 kPA) between

the condenser water inlet and the outlet of the ice

machine.

• Water exiting the condenser must not exceed 110F

(43C).

Water Supply and Drain Line Sizing/Connections

Warning

PERSONAL INJURY POTENTIAL

For ice making, connect to a potable water supply

only.

Important

If you are installing a water filter system, refer to

the Installation Instructions supplied with the filter

system for ice making water inlet connections.

Location Water

Temperature

Water

Pressure

Ice Machine

Fitting

Tubing Size Up to Ice

Machine Fitting

Ice Making

Water Inlet

40F (4C) Min.

90F (32C) Max.

20 psi (137.9 kPA) Min.

80 psi (551.5 kPA) Max.

3/8" Female Pipe

Thread

3/8" (9.5 mm) minimum

inside diameter

Condenser Water

Inlet

40F (4C) Min.

90F (32C) Max.

20 psi (137.9 kPA) Min.

150 psi (1034.2 kPA) Max.

3/8" Female Pipe

Thread

K270 Only

1/2" Female Pipe

Thread

3/8" (9.5 mm) minimum

inside diameter

K270 Only

1/2" (12.7 mm)

minimum inside diameter

Condenser Water

Drain

--- --- 1/2" Female Pipe

Thread

1/2" (12.7 mm) minimum

inside diameter

Bin Drain

--- --- 1/2" Female Pipe

Thread

1/2"” (12.7 mm) minimum

inside diameter

Installation Instructions Section 2

10 Part Number 040004686 8/15

Before Starting the Ice Machine

All ice machines are factory-operated and adjusted before shipment. Normally, new installations do not require any

adjustment.

To ensure proper operation, follow the Operational Checks in Section 3 of this manual. Starting the ice machine and

completing the Operational Checks are the responsibilities of the owner/operator.

Adjustments and maintenance procedures outlined in this manual are not covered by the warranty.

Installation Checklist

Warning

PERSONAL INJURY POTENTIAL

Do not operate equipment that has been misused,

abused, neglected, damaged, or altered/modified

from that of original manufactured specifications.

Is the ice machine level?

Has all of the internal packing been removed?

Have all of the electrical and water connections

been made?

Has the supply voltage been tested and

checked against the rating on the nameplate?

Is there proper clearance around the ice

machine for air circulation?

Is the ice machine grounded and polarity

correct?

Has the ice machine been installed where

ambient temperatures will remain in the range

of 40° – 110°F (4° – 43°C)?

Has the ice machine been installed where the

incoming water temperature will remain in the

range of 40° – 90°F (4° – 32°C)?

Is there a separate drain for the water-cooled

condenser?

Is there a separate drain for the bin?

Are the ice machine and bin drains vented?

Are all electrical leads free from contact with

refrigeration lines and moving equipment?

Has the owner/operator been instructed

regarding maintenance and the use of Cleaner

and Sanitizer?

Has the owner/operator completed the warranty

registration card?

Has the ice machine and bin been sanitized?

Is the toggle switch set to ice? (The toggle

switch is located directly behind the front panel).

Is the ice thickness control set correctly? (Refer

to Operational Checks to check/set the correct

ice bridge thickness).

Is the float valve in the OPEN position?

Section 3 Operation

Part Number 040004686 8/15 11

Section 3

Operation

Ice Making Sequence of Operation

INITIAL START-UP OR START-UP AFTER

AUTOMATIC SHUT-OFF

1. Pressure Equalization

Before the compressor starts the hot gas valve is

energized for 15 seconds to equalize pressures during

the initial refrigeration system start-up.

2. Refrigeration System Start-Up

The compressor starts after the 15-second pressure

equalization, and remains on throughout the entire

Freeze and Harvest Sequences. The hot gas valve

remains on for 5 seconds during initial compressor start-

up and then shuts off.

At the same time the compressor starts, the condenser

fan motor (air-cooled models) is supplied with power

throughout the entire Freeze and Harvest Sequences.

The fan motor is wired through a fan cycle pressure

control, therefore it may cycle on and off. (The

compressor and condenser fan motor are wired through

the relay. As a result, any time the relay coil is energized,

the compressor and fan motor are supplied with power.)

FREEZE SEQUENCE

3. Prechill

The compressor energizes to prechill the evaporator

prior to water flow.

4. Freeze

The water pump starts after the Prechill. An even flow of

water is directed across the evaporator and into each

cube cell, where it freezes.

When sufficient ice has formed, the water flow (not the

ice) contacts the ice thickness probe. After

approximately 7 seconds of continual water contact, the

Harvest Sequence is initiated. The ice machine cannot

initiate a Harvest Sequence until a 6-minute freeze time

has been surpassed.

HARVEST SEQUENCE

5. Harvest

The water pump de-energizes stopping flow over the

evaporator. The rising level of water in the sump trough

diverts water out of the overflow tube, purging excess

minerals from the sump trough. The hot gas valve also

opens to divert hot refrigerant gas into the evaporator.

The refrigerant gas warms the evaporator causing the

cubes to slide, as a sheet, off the evaporator and into the

storage bin. The sliding sheet of cubes contacts the ice

damper, opening the bin switch.

The momentary opening and re-closing of the bin switch

terminates the Harvest Sequence and returns the ice

machine to the Freeze Sequence (steps 3 - 4).

AUTOMATIC SHUT-OFF

6. Automatic Shut-Off

When the storage bin is full at the end of a Harvest

Sequence, the sheet of cubes fails to clear the ice

damper and will hold it down. After the ice damper is

held open for 7 seconds, the ice machine shuts off. The

ice machine remains off for 3 minutes before it can

automatically restart.

The ice machine remains off until enough ice has been

removed from the storage bin to allow the ice to fall clear

of the damper. As the ice damper swings back to the

operating position, the bin switch re-closes and the ice

machine restarts (steps 1 - 2), provided the 3-minute

delay period is complete.

Operation Section 3

12 Part Number 040004686 8/15

Energized Parts Chart

* Condenser Fan Motor: The fan motor is wired through a fan cycle pressure control, therefore, it may cycle on and off.

CONTROL BOARD RELAYS RELAY

1 2 3 3A 3B

LENGTH

WATER

PUMP

HOT GAS

VALVE

RELAY

COIL

COMPRESSOR CONDENSER 

FAN MOTOR

of “ON”

TIME

INITIAL START-UP/

START UP AFTER

AUTO SHUT-OFF:

1. Pressure

Equalization

OFF ON OFF OFF OFF

Seconds

2. Refrigeration

System Start-up

OFF ON ON ON ON

Seconds

FREEZE

SEQUENCE:

3. Pre-Chill

OFF OFF ON ON ON

Seconds

4. Freeze

ON OFF ON ON ON

Until 7 sec.

water contact

with ice

thickness

probe

HARVEST

SEQUENCE:

5. Harvest

OFF ON ON ON ON

Bin switch

activation

AUTOMATIC SHUT-

OFF:

6. Auto Shut-Off

OFF OFF OFF OFF OFF

Until

bin switch

re-closes

Section 3 Operation

Part Number 040004686 8/15 13

Operational Checks

GENERAL

Your Koolaire ice machine was factory-operated and

adjusted before shipment. Normally, a newly installed ice

machine does not require any adjustment.

To ensure proper operation, always follow these

Operational Checks when starting the ice machine:

• for the first time

• after a prolonged out of service period

• after cleaning and sanitizing

Routine adjustments and maintenance procedures

outlined in this manual are not covered by the warranty.

SIPHON SYSTEM

To reduce mineral build-up and cleaning frequency, the

water in the sump trough must be purged during each

harvest cycle.

When the water pump de-energizes the level in the

water trough rises above the standpipe starting a siphon

action. The siphon action stops when the water level in

the sump trough drops. When the siphon action stops,

the float valve refills the water trough to the correct level.

Siphon System Check

Follow steps 1 through 6 under water level check.

WATER FLOAT VALVE CHECK

Before water will flow into the water trough the float

valve shut-off must be in the OPEN position.

Water Level

WATER

LEVEL

SIPHON

CAP

STANDPIPE

DRAIN

PRESS TO

OPEN

PRESS TO

Operation Section 3

14 Part Number 040004686 8/15

WATER LEVEL CHECK

Check the water level while the ice machine is in the ice

mode and the water pump is running. The correct water

level is 1/4" (6.3mm) to 3/8" (9.5mm) below the top of

the standpipe a line in the water trough indicates the

correct level.

Water Level

The float valve is factory-set for the proper water level. If

adjustments are necessary:

1. Verify the ice machine is level (see page 2-4).

2. Remove the siphon cap from the standpipe.

3. Place the main ON/OFF/WASH toggle switch to the

ON position, and wait until the float valve stops

adding water.

4. Adjust the water level to (1/4" to 3/8" (6.3 to 9.5 mm)

below the standpipe) the line in the water trough:

5. Loosen the two screws on the float valve bracket.

6. Raise or lower the float valve assembly as

necessary, then tighten the screws.

7. Move the main ON/OFF/ WASH toggle switch to the

OFF position. The water level in the trough will rise

above the standpipe and run down the drain.

8. Replace the siphon cap on the standpipe, and verify

water level and siphon action by repeating steps 3

through 5.

ICE BRIDGE THICKNESS CHECK

The ice thickness probe is factory-set to maintain the ice

bridge thickness at 1/8" (3.2 mm).

1. Inspect the bridge connecting the cubes. It should

be about 1/8" (3.2 mm) thick.

2. If adjustment is necessary, turn the ice thickness

probe adjustment screw clockwise to increase

bridge thickness, or counterclockwise to decrease

bridge thickness.

NOTE: Turning the adjustment 1/3 of a turn will change

the ice thickness about 1/16" (1.5 mm).

Ice Thickness Check

Make sure the ice thickness probe wire and the bracket

do not restrict movement of the probe.

SIPHON CAP

SET THE WATER LEVEL

TO THE LINE IN THE

WATER TROUGH

ADJUSTING SCREW

1/8" ICE BRIDGE THICKNESS

Section 4 Maintenance

Part Number 040004686 8/15 15

Section 4

Maintenance

Interior Cleaning and Sanitizing

GENERAL

Clean and sanitize the ice machine every six months for

efficient operation. If the ice machine requires more

frequent cleaning and sanitizing, consult a qualified

service company to test the water quality and

recommend appropriate water treatment.

The ice machine must be taken apart for cleaning and

sanitizing.

CLEANING AND SANITIZING PROCEDURE

Ice machine cleaner is used to remove lime scale and

mineral deposits. Ice machine sanitizer disinfects and

removes algae and slime.

Step 1 Set the toggle switch to the OFF position after

ice falls from the evaporator at the end of a Harvest

cycle. Or, set the switch to the OFF position and allow

the ice to melt off the evaporator.

Step 2 Remove all ice from the bin.

Step 3 To start a cleaning cycle, move the toggle switch

to the WASH position.

Step 4 Add the proper amount of Ice Machine Cleaner

to the water trough.

Step 5 Wait until the clean cycle is complete

(approximately 22 minutes) then place the toggle switch

in the OFF position, disconnect power and water

supplies to the ice machine.

Caution

Use only Koolaire approved Ice Machine Cleaner

(part number 94-0546-3) and Sanitizer (part

number 94-0565-3). It is a violation of Federal law

to use these solutions in a manner inconsistent with

their labeling. Read and understand all labels

printed on bottles before use.

Caution

Do not mix Ice Machine Cleaner and Sanitizer

solutions together. It is a violation of Federal law to

use these solutions in a manner inconsistent with

their labeling.

Warning

Wear rubber gloves and safety goggles (and/or face

shield) when handling Ice Machine Cleaner or

Sanitizer.

Caution

Never use anything to force ice from the evaporator.

Damage may result.

Model Amount of Cleaner

K170 2 ounces (60 ml)

K270 2 ounces (60 ml)

Warning

Disconnect electric power to the ice machine at the

electric switch box before proceeding.

Maintenance Section 4

16 Part Number 040004686 8/15

Step 6 Remove parts for cleaning.

A. Remove Two Thumbscrews and Water Pump

Cover (When Used).

B. Remove the Vinyl Hose Connecting the

Water Pump and Water Distribution Tube

C. Remove Water Pump

• Disconnect the water pump power cord

• Loosen the screws securing the pump-

mounting bracket to the bulkhead

• Lift the pump and bracket assembly off the

mounting screws..

Water Pump Removal

D. Remove the Ice Thickness Probe

• Compress the side of the ice thickness probe

near the top hinge pin and remove it from the

bracket.

Ice Thickness Probe Removal

NOTE: At this point, the ice thickness probe can easily

be cleaned. If complete removal is desired follow the ice

thickness probe wire to the bulkhead grommet (exit

point) in the back wall. Pop the bulkhead grommet out of

the back wall by inserting fingernails or a flat object

between the back wall and the grommet and prying

forward. Pull the bulkhead grommet and wire forward

until the connector is accessible, then disconnect the

wire lead from the connector.

Ice Thickness Probe Cleaning

• Mix a solution of ice machine cleaner and water (2

ounces of cleaner to 16 ounces of water) in a

container.

• Soak the ice thickness probe a minimum of 10

minutes.

Clean all ice thickness probe surfaces and verify the ice

thickness probe cavity is clean. Rinse thoroughly with

clean water, then dry completely. Incomplete rinsing and

drying of the ice thickness probe can cause premature

harvest.

DO NOT SOAK

WATER PUMP MOTOR IN

CLEANER OR SANITIZER

SOLUTIONS

When Used - REMOVE

THUMBSCREWS AND

WATER PUMP COVER

ICE THICKNESS

PROBE

COMPRESS SIDES OF ICE

THICKNESS PROBE

Section 4 Maintenance

Part Number 040004686 8/15 17

E. Remove the Water Distribution Tube

K170/K210/K270 Water Distribution Tube Removal

• Loosen the two thumbscrews, which secure the

distribution tube.

• Lift the right side of the distribution tube up off the

locating pin, then slide it back and to the right.

Disassembly

• Twist both of the inner tube ends until the tabs line up

with the keyways.

• Pull the inner tube ends outward.

Water Distribution Tube Disassembly

F. Remove the Float Valve

• Turn the splash shield counterclockwise one or two

turns.

Float Valve Removal

• Pull the float valve forward and off the mounting

bracket.

• Disconnect the water inlet tube from the float valve at

the compression fitting.

• Remove the cap and filter screen for cleaning.

Caution

Do not force this removal. Be sure the locating pin is

clear of the hole before sliding the distribution tube

out.

1. LIFT UP

2. SLIDE BACK

3. SLIDE TO RIGHT

DISTRIBUTION

TUBE

THUMBSCREW

LOCATING

INNER TUBE

TAB

KEYWAY

INNER TUBE

FLOAT VALVE

BRACKET

COMPRESSION

FITTING

CAP AND

FILTER SCREEN

SHUT-OFF VALVE

SPLASH SHIELD

FLOAT

Maintenance Section 4

18 Part Number 040004686 8/15

G. Remove the Water Trough

• Apply downward pressure on the siphon tube and

remove from the bottom of the water trough.

• Remove the upper thumbscrew.

• While supporting the water trough remove the two

thumbscrews from beneath the water trough.

• Remove the water trough from the bin area.

H. Remove the ice damper.

• Grasp ice damper and apply pressure toward the left

hand mounting bracket.

• Apply pressure to the right hand mounting bracket

with thumb.

• Pull ice damper forward when the right hand ice

damper pin disengages.

Installation

• Place ice damper pin in left hand mounting bracket

and apply pressure toward the left hand mounting

bracket.

• Apply pressure to the right hand mounting bracket

with thumb.

• Push ice damper toward evaporator until right hand

damper pin engages.

REMOVE

SIPHON TUBE

UPPER

THUMBSCREW

LOWER

THUMBSCREWS

Section 4 Maintenance

Part Number 040004686 8/15 19

I. Remove the Bin Door

• Grasp the rear of the bin door and pull bin door

forward approximately 5".

• Slide bin door to the rear while applying upward

pressure (The rear door pins will ride up into the track

slot and slide backward to the stop tab).

• While applying pressure against the bin door pull

down on the rear of each bin door track until the door

pins clear the stop tabs.

• Slide the rear door pins off the end and then below

the door track. Slide bin door forward allowing the

back of the door to lower into the bin. Continue

forward with the bin door until the front pins bottom

out in the track.

• Lift right side of door until the front pins clear the

track, then remove door from bin.

• Remove rollers (4) from all door pins.

Step 7 Mix a solution of cleaner and warm water.

Depending on the amount of mineral buildup, a larger

quantity of solution may be required. Use the ratio in the

table below to mix enough solution to thoroughly clean

all parts.

Step 8 Use ½ of the cleaner/water solution to clean all

components. The cleaner solution will foam when it

contacts lime scale and mineral deposits; once the

foaming stops use a soft bristle brush, sponge or cloth

(not a wire brush) to carefully clean the parts. Soak the

parts for 5 minutes (15 – 20 minutes for heavily scaled

parts). Rinse all components with clean water.

Step 9 While components are soaking, use ½ of the

cleaner/water solution to clean all foodzone surfaces of

the ice machine and bin. Use a nylon brush or cloth to

thoroughly clean the following ice machine areas:

• Evaporator plastic parts – including top, bottom and

sides

• Bin bottom, sides and top

Rinse all areas thoroughly with clean water.

Step 10 Mix a solution of sanitizer and warm water.

TRACK SLOT

SLIDE DOOR

FORWARD

STOP TAB

PRESS DOWN TO

RELEASE DOOR

ROLLER

Solution Type Water Mixed with

Cleaner 1 gal. (4 l) 16 oz (500 ml) cleaner

Solution Type Water Mixed With

Sanitizer 6 gal. (23 l) 4 oz (120 ml) sanitizer

Maintenance Section 4

20 Part Number 040004686 8/15

Step 11 Use 1/2 of the sanitizer/water solution to

sanitize all removed components. Use a cloth or sponge

to liberally apply the solution to all surfaces of the

removed parts or soak the removed parts in the

sanitizer/water solution. Do not rinse parts after

sanitizing.

Step 12 Use 1/2 of the sanitizer/water solution to

sanitize all foodzone surfaces of the ice machine and

bin. Use a cloth or sponge to liberally apply the solution.

When sanitizing, pay particular attention to the following

areas:

• Evaporator plastic parts - including top, bottom and

sides

• Bin bottom, sides and top

Do not rinse the sanitized areas.

Step 13 Replace all removed components.

Step 14 Reapply power and water to the ice machine

and place the toggle switch in the WASH position.

Step 15 Add the proper amount of Ice Machine

Sanitizer to the water trough.

Step 16 Wait until the sanitize cycle is complete

(approximately 22 minutes) then place the toggle switch

in the OFF position, disconnect power and water

supplies to the ice machine.

Step 17 Repeat step 6 to remove parts for hand

sanitizing.

Step 18 Mix a solution of sanitizer and warm water.

Step 19 Use 1/2 of the sanitizer/water solution to

sanitize all removed components. Use a cloth or sponge

to liberally apply the solution to all surfaces of the

removed parts or soak the removed parts in the

sanitizer/water solution. Do not rinse parts after

sanitizing.

Step 20 Use 1/2 of the sanitizer/water solution to

sanitize all foodzone surfaces of the ice machine and

bin. Use a cloth or sponge to liberally apply the solution.

When sanitizing, pay particular attention to the following

areas:

• Evaporator plastic parts - including top, bottom and

sides

• Bin bottom, sides and top

Do not rinse the sanitized areas.

Step 21 Replace all removed components.

Step 22 Reapply power and water to the ice machine

and place the toggle switch in the ICE position.

Model Amount of Sanitizer

K170 2.2 ounces (66 ml)

K270 1.9 ounces (57 ml)

Warning

Disconnect electric power to the ice machine at the

electric switch box before proceeding.

Solution Type Water Mixed With

Sanitizer 6 gal. (23 l) 4 oz (120 ml) sanitizer

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Koolaire Undercounter Models Owner Instruction Manual

Brand: Koolaire

Model: Undercounter Models

Category: Ice cube makers

Type: Owner Instruction Manual

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